On servers with nginx, Cpnginx installed through, we have a problem when accessing via proxy Horde, webmail <domaincustomer>.<tld>
All work except horde.
In firefox we have seen that the call to http://webmail.<domaincustomer>.<tld>/horde/index.php server generates a response to a malformed URL.
We have tried to help the developer but his professionalism is simply that it is a known issue (You will not find information about it, and neither wants to provide it), and that is Horde.
Well, if we disable horde nginx works perfectly, if enabled, does not work.
Anyone have a similar problem and know? Know where information?